THERMODYNAMIC STUDY OF YE’ELIMITE FORMATION
Y. El Khessaimi, Y. El Hafiane, A. Smith
IRCER, UMR CNRS 7315, Université de Limoges, Centre Européen de la Céramique, 12 avenue Atlantis, 87068, Limoges cedex, France
Abstract
The production of Calcium Sulfo-aluminate cements (CSA) involves lower
CO2 emissions compared to the ordinary Portland cement (OPC). Ye’elimite (Ca4Al6O16S)
is the main phase in CSA clinkers. Some solid-state reactions proposed in literature to
discuss ye’elimite formation may not been thermodynamically verified. The purpose of the
current work is the equilibrium calculations of standard Gibbs free energy changes for the
reactions involved during ye’elimite formation.